Left 4 Dead Characters Join Zombie Army 4

Rebellion announces the release of Abaddon Asylum on Steam as a new Season 3, Pack 2 DLC for Zombie Army 4: Dead War. This adds a new campaign mission, a WW1 Josiah outfit, weapon bundles, and more to the zombie-infested shooter. There is now a total of $370.30 worth of DLC available for the game. But it's not all about paying for that new pool. There's also a new free DLC pack that adds the survivors from the original Left 4 Dead to the game's playable characters. Here's a new trailer and here's more:
Renowned zombie slayers Bill, Francis, Louis and Zoey from the Valve smash hit, Left 4 Dead, are tooled up and ready to take on a new horde as they join ZOMBIE ARMY 4: DEAD WAR as brand new playable characters in the latest free DLC in Season 3 - which is available now. In addition to the free characters, Season Pass owners can now visit the spine-chilling Abaddon Asylum in a new campaign mission which is also available as standalone DLC.

Abaddon Asylum is the second mission in the ‘Return to Hell’ campaign, following the events of Terminal Error where you uncovered information about the location of Baron Umbra, the mastermind behind the dastardly occult scheme. You will have to fight your way into the Asylum before tracking down Baron Umbra and taking him out once and for all.